"To Any Published WebOS Devs: We'll give you what you need to be successful on #WindowsPhone, incl. free phones, dev tools, and training, etc.," Watson tweeted a day after HP announced it was dropping WebOS-based tablets and smartphones. Before Friday was out, Watson said he had received more than 500 emails from interested developers, and later, that the count was closing in on 600.

Watson fielded scores of Twitter messages, telling senders to shoot him an email and he would connect developers to a Windows Phone 7 "champion" who would help them out. He also directed developers to the Windows Phone 7 tools site.

Although HP announced last Thursday that it would stop making WebOS-based tablets and smartphones -- including the TouchPad, which was dumped at fire sale prices over the weekend by many retailers -- the company said it would continue development of the WebOS platform, and perhaps license it to other hardware makers.

That wasn't enough to keep WebOS developers from looking to jump ship. "Alrighty then -- I'm excited to get started in porting over apps. #HP #TouchPad #WebOS fiasco this weekend is the last straw," tweeted someone identified as "Porsche Heritage," whose Twitter account linked to a Facebook page about classic Porsche sports cars. "Demonstrate you are serious about #wpdev ... [and] we have phones 4 u," Watson tweeted in a Sunday reply.